scholarly journals Abundances and implications of volatile-bearing species from evolved gas analysis of the Rocknest aeolian deposit, Gale Crater, Mars

2014 ◽  
Vol 119 (1) ◽  
pp. 237-254 ◽  
Author(s):  
Paul Douglas Archer ◽  
Heather B. Franz ◽  
Brad Sutter ◽  
Ricardo D. Arevalo ◽  
Patrice Coll ◽  
...  
Keyword(s):  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Evolved Gas ◽  
Gale Crater ◽  
Aeolian Deposit

scholarly journals Sulfur-bearing phases detected by evolved gas analysis of the Rocknest aeolian deposit, Gale Crater, Mars

2014 ◽  
Vol 119 (2) ◽  
pp. 373-393 ◽  
Author(s):  
Amy C. McAdam ◽  
Heather B. Franz ◽  
Brad Sutter ◽  
Paul D. Archer ◽  
Caroline Freissinet ◽  
...  
Keyword(s):  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Evolved Gas ◽  
Gale Crater ◽  
Aeolian Deposit

scholarly journals A Review of Sample Analysis at Mars-Evolved Gas Analysis Laboratory Analog Work Supporting the Presence of Perchlorates and Chlorates in Gale Crater, Mars

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 475
Author(s):  
Joanna Clark ◽  
Brad Sutter ◽  
P. Douglas Archer ◽  
Douglas Ming ◽  
Elizabeth Rampe ◽  
...  
Keyword(s):  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Sample Analysis ◽  
Evolved Gas ◽  
Gale Crater ◽  
Analysis Laboratory ◽  
Mars Analog ◽  
Human Exploration ◽  
Laboratory Analog

The Sample Analysis at Mars (SAM) instrument on the Curiosity rover has detected evidence of oxychlorine compounds (i.e., perchlorates and chlorates) in Gale crater, which has implications for past habitability, diagenesis, aqueous processes, interpretation of in situ organic analyses, understanding the martian chlorine cycle, and hazards and resources for future human exploration. Pure oxychlorines and mixtures of oxychlorines with Mars-analog phases have been analyzed for their oxygen (O2) and hydrogen chloride (HCl) releases on SAM laboratory analog instruments in order to constrain which phases are present in Gale crater. These studies demonstrated that oxychlorines evolve O2 releases with peaks between ~200 and 600 °C, although the thermal decomposition temperatures and the amount of evolved O2 decrease when iron phases are present in the sample. Mg and Fe oxychlorines decompose into oxides and release HCl between ~200 and 542 °C. Ca, Na, and K oxychlorines thermally decompose into chlorides and do not evolve HCl by themselves. However, the chlorides (original or from oxychlorine decomposition) can react with water-evolving phases (e.g., phyllosilicates) in the sample and evolve HCl within the temperature range of SAM (<~870 °C). These laboratory analog studies support that the SAM detection of oxychlorine phases is consistent with the presence of Mg, Ca, Na, and K perchlorate and/or chlorate along with possible contributions from adsorbed oxychlorines in Gale crater samples.

scholarly journals Organic matter preserved in 3-billion-year-old mudstones at Gale crater, Mars

Science ◽  
2018 ◽  
Vol 360 (6393) ◽  
pp. 1096-1101 ◽  
Author(s):  
Jennifer L. Eigenbrode ◽  
Roger E. Summons ◽  
Andrew Steele ◽  
Caroline Freissinet ◽  
Maëva Millan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Products ◽  
Evolved Gas ◽  
Gale Crater ◽  
In Situ Detection ◽  
Curiosity Rover

Establishing the presence and state of organic matter, including its possible biosignatures, in martian materials has been an elusive quest, despite limited reports of the existence of organic matter on Mars. We report the in situ detection of organic matter preserved in lacustrine mudstones at the base of the ~3.5-billion-year-old Murray formation at Pahrump Hills, Gale crater, by the Sample Analysis at Mars instrument suite onboard the Curiosity rover. Diverse pyrolysis products, including thiophenic, aromatic, and aliphatic compounds released at high temperatures (500° to 820°C), were directly detected by evolved gas analysis. Thiophenes were also observed by gas chromatography–mass spectrometry. Their presence suggests that sulfurization aided organic matter preservation. At least 50 nanomoles of organic carbon persists, probably as macromolecules containing 5% carbon as organic sulfur molecules.

Evolved Gas Analysis by Infrared Spectroscopy

2010 ◽  
Vol 45 (4) ◽  
pp. 241-273 ◽  
Author(s):  
S. Materazzi ◽  
S. Vecchio
Keyword(s):  
Infrared Spectroscopy ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Evolved Gas
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